Files
addr2line
adler
aho_corasick
ansi_term
atty
backtrace
base64
bincode
bitflags
bitmaps
bstr
byteorder
bytes
bytesize
cargo
cargo_platform
cfg_if
chrono
clap
color_backtrace
corpus_database
corpus_database_dsl
corpus_extractor
corpus_manager
corpus_manager_driver
corpus_queries_derive
corpus_queries_impl
crates_index
crates_io
crc32fast
crossbeam_queue
crossbeam_utils
crypto_hash
csv
csv_core
curl
curl_sys
darling
darling_core
darling_macro
datafrog
datapond
datapond_derive
datapond_macro
either
encoding_rs
env_logger
error_chain
failure
failure_derive
filetime
flate2
fnv
foreign_types
foreign_types_shared
form_urlencoded
fs2
futures
futures_channel
futures_core
futures_io
futures_macro
futures_sink
futures_task
futures_util
async_await
future
io
lock
stream
task
getrandom
gimli
git2
git2_curl
glob
globset
h2
hashbrown
heck
hex
home
http
http_body
httparse
httpdate
humantime
hyper
hyper_tls
ident_case
idna
ignore
im_rc
indexmap
iovec
ipnet
itertools
itoa
jobserver
lazy_static
lazycell
libc
libgit2_sys
libnghttp2_sys
libssh2_sys
libz_sys
lock_api
log
log_derive
matches
maybe_uninit
memchr
mime
miniz_oxide
mio
mio_uds
native_tls
nix
num_cpus
num_integer
num_traits
object
once_cell
opener
openssl
openssl_probe
openssl_sys
parking_lot
parking_lot_core
percent_encoding
pest
pin_project
pin_project_lite
pin_utils
ppv_lite86
print_stats
proc_macro2
proc_macro_error
proc_macro_error_attr
proc_macro_hack
proc_macro_nested
quick_error
quote
rand
rand_chacha
rand_core
rand_xoshiro
regex
regex_automata
regex_syntax
remove_dir_all
reqwest
rustc
rustc_demangle
rustc_hash
rustc_workspace_hack
rustfix
rustwide
ryu
same_file
scopeguard
semver
semver_parser
serde
serde_derive
serde_ignored
serde_json
serde_urlencoded
shell_escape
signal_hook_registry
simplelog
sized_chunks
slab
smallvec
socket2
strip_ansi_escapes
strsim
structopt
structopt_derive
syn
synstructure
tar
tempdir
tempfile
termcolor
textwrap
thiserror
thiserror_impl
thread_local
time
tinyvec
tinyvec_macros
tokio
future
io
loom
macros
net
park
runtime
sync
task
time
util
tokio_executor
tokio_io
tokio_native_tls
tokio_process
tokio_reactor
tokio_signal
tokio_stream
tokio_sync
tokio_util
toml
tower_service
tracing
tracing_core
tracing_futures
try_lock
typenum
ucd_trie
unicode_bidi
unicode_normalization
unicode_segmentation
unicode_width
unicode_xid
url
utf8parse
vec_map
vte
walkdir
want
xattr
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
use {Poll, Async};
use stream::Stream;

/// A stream which "fuse"s a stream once it's terminated.
///
/// Normally streams can behave unpredictably when used after they have already
/// finished, but `Fuse` continues to return `None` from `poll` forever when
/// finished.
#[derive(Debug)]
#[must_use = "streams do nothing unless polled"]
pub struct Fuse<S> {
    stream: S,
    done: bool,
}

// Forwarding impl of Sink from the underlying stream
impl<S> ::sink::Sink for Fuse<S>
    where S: ::sink::Sink
{
    type SinkItem = S::SinkItem;
    type SinkError = S::SinkError;

    fn start_send(&mut self, item: S::SinkItem) -> ::StartSend<S::SinkItem, S::SinkError> {
        self.stream.start_send(item)
    }

    fn poll_complete(&mut self) -> Poll<(), S::SinkError> {
        self.stream.poll_complete()
    }

    fn close(&mut self) -> Poll<(), S::SinkError> {
        self.stream.close()
    }
}

pub fn new<S: Stream>(s: S) -> Fuse<S> {
    Fuse { stream: s, done: false }
}

impl<S: Stream> Stream for Fuse<S> {
    type Item = S::Item;
    type Error = S::Error;

    fn poll(&mut self) -> Poll<Option<S::Item>, S::Error> {
        if self.done {
            Ok(Async::Ready(None))
        } else {
            let r = self.stream.poll();
            if let Ok(Async::Ready(None)) = r {
                self.done = true;
            }
            r
        }
    }
}

impl<S> Fuse<S> {
    /// Returns whether the underlying stream has finished or not.
    ///
    /// If this method returns `true`, then all future calls to poll are
    /// guaranteed to return `None`. If this returns `false`, then the
    /// underlying stream is still in use.
    pub fn is_done(&self) -> bool {
        self.done
    }

    /// Acquires a reference to the underlying stream that this combinator is
    /// pulling from.
    pub fn get_ref(&self) -> &S {
        &self.stream
    }

    /// Acquires a mutable reference to the underlying stream that this
    /// combinator is pulling from.
    ///
    /// Note that care must be taken to avoid tampering with the state of the
    /// stream which may otherwise confuse this combinator.
    pub fn get_mut(&mut self) -> &mut S {
        &mut self.stream
    }

    /// Consumes this combinator, returning the underlying stream.
    ///
    /// Note that this may discard intermediate state of this combinator, so
    /// care should be taken to avoid losing resources when this is called.
    pub fn into_inner(self) -> S {
        self.stream
    }
}